EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
• MH : Pelagic water column
  
  • MH1 : Neuston
    
  • MH2 : Completely mixed water column with reduced salinity
    
  • MH3 : Completely mixed water column with full salinity
    
    • MH31 : Arctic completely mixed water column with full salinity
      
    • MH32 : Atlantic completely mixed water column with full salinity
      
    • MH33 : Baltic completely mixed water column with full salinity
      
    • MH34 : Black Sea completely mixed water column with full salinity
      
    • MH35 : Mediterranean completely mixed water column with full salinity
      
      • MH351 : Mediterranean completely mixed water column with full salinity and short residence time
        
      • MH352 : Mediterranean completely mixed water column with full salinity and medium residence time
        
      • MH353 : Mediterranean completely mixed water column with full salinity and long residence time
        
  • MH4 : Partially mixed water column with reduced salinity and medium or long residence time
    
  • MH5 : Unstratified water column with reduced salinity
    
  • MH6 : Vertically stratified water column with reduced salinity
    
  • MH7 : Fronts in reduced salinity water column
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
  • N1 : Coastal dunes and sandy shores
    
  • N2 : Coastal shingle
    
  • N3 : Rock cliffs, ledges and shores, including the supralittoral
    
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
    • R41 : Snow-bed vegetation
      
    • R42 : Boreal and arctic acidophilous alpine grassland
      
    • R43 : Temperate acidophilous alpine grassland
      
    • R44 : Arctic-alpine calcareous grassland
      
      • R441 : Closed calciphile arctic-alpine grassland
        
      • R442 : Arctic-alpine wind edge Kobresia myosuroides swards
        
      • R443 : Arctic-alpine calciphilous stepped and garland grassland
        
      • R444 : Ponto-Caucasian alpine grassland
        
    • R45 : Alpine and subalpine calcareous grassland of the Balkans and Apennines
      
  • R5 : Forest fringes and clearings and tall forb stands
    
    • R51 : Thermophilous forest fringe of base-rich soils
      
    • R52 : Forest fringe of acidic nutrient-poor soils
      
    • R53 : Macaronesian thermophilous forest fringe
      
    • R54 : Pteridium aquilinum vegetation
      
    • R55 : Lowland moist or wet tall-herb and fern fringe
      
    • R56 : Montane to subalpine moist or wet tall-herb and fern fringe
      
    • R57 : Herbaceous forest clearing vegetation
      
  • R6 : Inland salt steppes and salt marshes
    
  • R7 : Sparsely wooded grasslands
    
    • R71 : Temperate wooded pasture and meadow
      
    • R72 : Hemiboreal and boreal wooded pasture and meadow
      
    • R73 : Mediterranean wooded pasture and meadow
      
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
  • V3 : Artificial grasslands and herb dominated habitats
    
    • V31 : Agriculturally-improved,
      
    • V32 : Mediterranean subnitrophilous annual grasslands
      
    • V33 : Dry mediterranean lands with unpalatable non-vernal herbaceous vegetation
      
    • V34 : Trampled xeric grasslands with annuals
      
    • V35 : Trampled mesophilous grasslands with annuals
      
    • V36 : Alpine and subalpine enriched grassland
      
    • V37 : Annual anthropogenic herbaceous vegetation
      
    • V38 : Dry perennial anthropogenic herbaceous vegetation
      
    • V39 : Mesic perennial anthropogenic herbaceous vegetation
      
  • V4 : Hedgerows
    
    • V41 : Hedgerows of non-native species
      
    • V42 : Highly-managed hedgerows of native species
      
    • V43 : Species-rich hedgerows of native species
      
    • V44 : Species-poor hedgerows of native species
      
  • V5 : Shrub plantations
    
    • V51 : Shrub plantations for whole-plant harvesting
      
    • V52 : Shrub plantations for leaf or branch harvest
      
    • V53 : Shrub plantations for ornamental purposes or for fruit, other than vineyards
      
    • V54 : Vineyards
      
  • V6 : Tree dominated man-made habitats